Startups supporting startups are blazing a new trail with support from venture capitalists.

TSVC Fund II portfolio company, Carta, which helps companies manage their cap tables, valuations, portfolio investments and equity plans, has announced an $80 million Series D at a valuation of $800 million. The company, formerly known as eShares, raised the capital from lead investors Meritech and Tribe Capital, with support from existing investors.

The round brings Carta’s total funding to $147.8 million. Its existing investors include Spark Capital, Menlo Ventures, Union Square Ventures and Social Capital.

Founded in 2012 by Henry Ward (pictured), the Palo Alto-based company plans to use the latest investment to develop their transfer agent and equity administration products and services to better support startups transitioning into public companies. It also will launch additional products for investors to collect data from their portfolio companies and to manage their back office.

“We’ve come this far by changing how ownership management works for private companies — popularizing electronic securities and cap table software, combined with audit-ready 409As,” Ward wrote in an announcement. “But our ambitions go far beyond supporting privately-held, venture-backed companies.”

Carta, which counts Robinhood, Slack, Wealthfront, Squarespace, Coinbase and more as customers, currently manages $500 billion in equity. This year, Carta expanded its headcount from 310 employees to 450 employees, launched board management and portfolio insights products.

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